Skip to content
OpenAdvisories
High · 8.7 CVE-2026-78416 EUVD-2026-64920GHSA-4ghj-75g5-h9pf

Authenticated RCE via `condition.config` JSON cleanse bypass

Published Aug 24, 2026 · Updated Aug 26, 2026 · Assigned by Hackrate

Description

Craft CMS versions from 4.0.0-RC1 before 4.18.2 and from 5.0.0-RC1 before 5.10.6 contain an authenticated remote code execution vulnerability in control panel element-search condition handling. A JSON cleanse bypass in condition.config allows Yii behavior/event configuration keys to be interpreted after decoding, enabling command execution as the PHP/web user.

Affected products

VendorProductAffectedFixed
craftcms cms 4.0.0-RC1 – < 4.18.2, 5.0.0-RC1 – < 5.10.6 4.18.2

References